I have been browsing the web looking for knitting help and have just found this site. I am trying to knit an afghan that has different block patterns. I am stuck on one of the patterns. It has a left twist stitch that goes like this

My question is how do I reach behind to k1 in 2st stitch? I have tried it several ways, but it doesn't look right. I would appreciate it very much if someone could either explain it very clearly or point me to a site that explains it. Thank you.